Its likely the Canadian debt collection laws are similar to the UK laws.

Because Canada; like Australia, America, New Zealand, South Africa, India and Pakistan have English heritage, its likely their legal system and laws are similar to England.

Australia has many laws which were actually passed by the British govt which is referred to as inherited law. I doubt Canada has inherited law but as assassin; said go through your local debt collection laws and mold the letters, if required, to match Canadian law. You would then likely be on the right path.